Electricity Review #2

An excess or shortage of electrons produces a net electric charge

• Conduction

• Induction

• Static Electricity

• Electron discharge

There is a relationship between the three measurable parts of an electrical circuit, which are

• current, voltage and resistance.

• electron, proton and neutron.

• light bulb, battery and plug.

• series, simple and parallel.

Which of the following could lead to static discharge?

• water molecules clinging together

• terminal velocity

• a vibration compressing molecules of air

• a build up of electrons on the atoms of an object

What is a material called that easily carries a current?

• insulator
• semiconductor
• electric potential
• conductor

A superconducting material

• Requires very high current
• Has no resistance at room temperatures
• Has no resistance at low temperatures
• Voltage equals current times resistance

The law of conservation of charge states that

• There is always a constant flow of electorns

• Electrons in a system are always moving

• The same charge in the beginning is always the same charge in the end.

• The charge in a system is always changing.

Which melts to protect a circuit?

• Three-prong plug
• wiring
• diode
• fuse

What does “I” represent in the equation?

• voltage
• resistance
• current
• kilowatts

An object has a negative charge if its atoms

• have an equal number of protons and electrons

• lose electrons

• have more electrons than protons

• have fewer electrons than protons

If a student rubs a balloon against her hair, her hair has a positive charge because her hair has

• gained electrons

• lost electrons

• lost protons

• gained neutrons